1. Korobitsyn MA. Analysis of cogeneration, combined and integrated cycles. PhD thesis, University of Twente, The Netherlands, 1998.
2. Cornelissen RL. Thermodynamics and sustainable development. PhD thesis, University of Twente, The Netherlands, 1997.
3. Towards a methodology for life cycle impact assessment;Udo de Haes,1996
4. Environmental life cycle assessment of products, guide;Heijungs,1992
5. Environmental life cycle assessment of products, backgrounds;Heijungs,1992